Au@SiO2的合成及表征+文献综述
毕业论文关键词： 表面增强拉曼光谱(SERS)；Au@SiO2；金纳米颗粒；二氧化硅壳
Synthesis and Characterization of
Au@SiO2 core-shell colloids
Abstract: In recent years, core-shell structure of the metal shell particularly gold nanoshells attracted much attention. This gold shell and the insulator core consisting of composite nanoparticles has broad application prospects in many areas of drug delivery, medical imaging and cancer treatment, and tissue repair. Because of their height-adjustable optical properties and good biocompatibility. However, due to some limitations of the gold shell, wrapped in a thin layer on the surface of SiO2 may be beneficial to the further application of the gold shell. If you can get a good surface Raman scattering, it will greatly expand the Au @SiO2 applications in the biomedical field. Therefore, this paper was prepared a good stability, good coating uniformity and Raman scattering of Au@SiO2. First use Frens method to restore the acid chloride with sodium citrate to obtain gold Au NPs, then use TEOS and sodium silicate precursors as two gold -coated silica gel. By controlling the amount of precursor and the reaction time to prepare the silica shell of different thickness. The paper provides a reference for further preparation of controling the thickness of the Au@SiO2 core-shell structure.
Keywords： Surface Enhanced Raman Spectroscopy (SERS); Au@SiO2; Au NPs; Silica shell
目录
1 前言 1
1.1 金属纳米材料 1
1.1.1 纳米材料的简介 1
1.1.2 金纳米颗粒 1
1.2 核壳纳米材料 3
1.3 表面增强拉曼散射（SERS）的介绍 3
1.3.1 SERS的现象和原理 4
1.3.2 SERS光谱的应用研究 4
1.4 纳米材料的表征 5
1.5 课题的研究目的和意义 6
2 实验部分 7
2.1 试剂与仪器 7
2.1.1 试剂 7
2.1.2 仪器 7
2.2 实验步骤 7
2.2.1 试剂的配制 7
2.2.2 金纳米颗粒的制备 8
2.2.3 TEOS为硅源的Au@SiO2的制备 8
2.2.4 硅酸钠为硅源的Au@SiO2的制备 8
2.2.5 紫外-可见吸收光谱测试 9
2.2.6 表面拉曼光谱测试 9
2.2.7 TEM表征 9
3 实验结果与讨论 10
3.1 金纳米颗粒的表征 10
3.2 Au@SiO2的表征 11
3.2.1 TEOS作为硅源的Au@SiO2的制备原理 11
3.2.2 硅酸钠作为硅源的Au@SiO2 13
3.2.3 Au@SiO2的SERS光谱表征 15
上一篇：单晶硅太阳能电池表面织构化研究